Pulverizing-mill



(No Model.)

W. G. SALMON.

PULVERI-ZING MILL. v a No. 255,678. Patented Mar. 28,1882.

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UNITED STATES PATENT OFFICE.

WILLIAM G. SALMON, OF PORTLAND, OREGON.

PULVERlZlNG-MILL. f

SPECIFICATION forming part of Letters Patent No. 255,678, dated March 28, 1882.

Application filed November 7, 1881. (X model.)

To all whom it may concern:

Be it known that I, WILLIAM CUT R SAL- MON, of Portland, in the county of Multnomah and State of Oregon, have invented certain useful Improvements in Pulverizing-Mills, of which the following isa full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a sectional side elevation of it my improvement. Fig. 2 is a plan view of the sta tionary part of the mill, the frame being shown in section. Fig. 3 is a face view of the pulverizer.

The object of this invention is to facilitate the pulverizing of ores, cements, bones, and

other substances that are required to be reduced to a powder- The invention consists in a pulverizingmill constructed with a vessel having a central projection on its bottom, forming a ring-chamber, a sectional ring-die in the bottom of the ringchamber, and screencovered openings in its sides for the escape of the pulp, and a ringshaped pulverizer having radial dies upon its lower side, which work on the ring-die. A driving mechanism connected with the pulverizer gives a wabbling movement thereto. Guideblocks attached to the central projection of the vessel cause the centering of the pulverizer while being operated, as will be hereinafter fully described.

A represents a tub or vessel, which is made with flaring sides and of any desired capacity. In the center of the bottom of the vessel A is formed a raised portion, B, made in the shape of a truncated cone, so as to form a ring-chamber in the lower part of the vessel A. In the bottom of the ring-shaped chamber of the vessel A is placed a die, (J, made in ring shape and in sections, as shown in Fig. 2, so that it can be readily removed when worn and replaced with a new die. In the middle part of the sides of the vessel A are formed openings, in which are secured wire-gauze screens D, to allow the pulp to escape when it has been reduced to a suitable fineness. The outflowing pulp is designed to be received in a ring-trough placed beneath the vessel A, but which is not shown in the drawings.

To the inclined sides of the central projection, B, are attached blocks E, the outer sides of which are inclined or curved, as shown in Fig. 1, and which are designed to serve as guides to center the pulverizer while being operated.

F is the pulverizer, which is made in ring shape. and of such a size as to work freelyin the ring-chamber of the vessel A.

To the lower side of the pulverizer F are attached radial dies or shoes G, to crush the ore or other substance against the lower or stationary die, (3. The dies G are secured detachabl y to the pulverizer F by bolts or screws, so that they can be readily replaced with new ones when worn. v

To the upper side of the pulverizer F is attached an arched frame or spider, H, in the center of which is formed a screw-hole to receive the lower end of the shaft 1. The upper end of the shaft I works in a hole in the outer end of the crank J, attached to the lower end of the short vertical shaft K, which revolves in bearings attached to the frame L in such positions that the shaft K will be directly over the center of the vessel A.

To the upper end of the shaft K is attached a beveled-gear wheel, M, the teeth of which mesh into the teeth of the beveled-gear wheel N, attached to the inner end of the horizontal shaft 0. The shaft- 0 revolves in bearings attached to the frame L, and to its outer end are attached a fast pulley, P, and a loose pulley, Q, to receive the driving-belt. The mill can be driven from any convenient power.

The ore or other substance to be pulverized is designed to be coarsely crushed in a stampmill or other crushing-mill before being intro duced into the vessel A.

With this construction, as the mill is operated the pulverizer F will be wabbled by the revolution of the crank J, so as to bring the dies Gr successively in contact with the substance placed upon the dies 0, and the said substance will be crushed and pulverized by the weight of the said pulverizer.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent--- .1. In a pulverizing-mill, the combination, with the ring-shaped pulverizer F, provided with radial dies G and means for giving a wabbling movement thereto, of the vessel A, proopenings in its sides, and provided with the vided with the central projection, B, having central inclined projection B, having curved curved blocks E attached to its sides, and the blocks E attached to its sides, and the ringdie 0 in the bottom of the said vessel, subshapeddie O in its bottom, substantially as 5 stantiIally as and for the purpose set forth. and for the purpose set forth.

2. n a pulverizing-mill, the combination, I w T with the ring-shaped pulverizer F, provided WILLIAM (JUTLER SALMON with the radial removable dies G, the spider H, Witnesses the shaft I, the crank J, and the driving ineoh- W. H. HARRIS,

1o anism of the vessel A, having screen-covered EUGENE D. WHITE. 

